TY - JOUR
T1 - Automatic phasing of MR images. Part I
T2 - Linearly varying phase
AU - Larry Bretthorst, G.
N1 - Funding Information:
I thank Joseph J.H. Ackerman, Jeffrey J. Neil, Joel R. Garbow, Dmitriy Yablonskiy, Alex Sukstansky and Josh Shimony for encouragement, support, and helpful comments. I thank William C. Hutton for his assistance with the literature search. This work was supported by the Small Animal Imaging Resources Program (SAIRP) of the National Cancer Institute, Grant R24CA83060, and by Grants NS35912, NS41519, NS41519 and HL70037.
PY - 2008/4
Y1 - 2008/4
N2 - In spin-echo and well shimmed gradient-echo images, the phase of the complex image often varies linearly in both the readout and phase-encode directions. Thus, in principle, it is possible to display an image in absorption mode. However, manually determining the two first-order and one zero-order phase parameters needed to display an absorption-mode image is a formidable task. In this paper, the Bayesian calculations needed to automatically determine these parameters are presented, and the calculations are illustrated using spin-echo images.
AB - In spin-echo and well shimmed gradient-echo images, the phase of the complex image often varies linearly in both the readout and phase-encode directions. Thus, in principle, it is possible to display an image in absorption mode. However, manually determining the two first-order and one zero-order phase parameters needed to display an absorption-mode image is a formidable task. In this paper, the Bayesian calculations needed to automatically determine these parameters are presented, and the calculations are illustrated using spin-echo images.
KW - Absorption-mode images
KW - Bayesian probability theory
KW - Frequency estimation
KW - Zero- and first-order phase estimation
UR - http://www.scopus.com/inward/record.url?scp=40949092727&partnerID=8YFLogxK
U2 - 10.1016/j.jmr.2007.12.010
DO - 10.1016/j.jmr.2007.12.010
M3 - Article
C2 - 18191597
AN - SCOPUS:40949092727
VL - 191
SP - 184
EP - 192
JO - Journal of Magnetic Resonance
JF - Journal of Magnetic Resonance
SN - 1090-7807
IS - 2
ER -